(picture included) 20 points - can someone solve 11, 12, 13, and 15?

Which representation has a constant of variation of -2.5

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Scenario: a rectangular plot of ground is 5 meters longer than it is wide. its area is 20,000 square meters. question: what equation will you find the dimensions? note: let w represent the width. options: w(w+5)=20,000 w^2=20,000+5 (w(w+5))/2=20,000 w+2(w+5)=20,000